This one happened after a Model S crash in Mexico. The last one happened less than a month ago in Kent, Wash. Since then Tesla’s share price has fallen from $193.90 on Sept. 30 to $160.58 this afternoon. The irrational exuberance that made the electric automaker the darling of Wall Street has now become merely excitable, although still unjustifiably so. Even Musk himself told Bloomberg last week, “The stock price that we have is more than we have any right to deserve.”